Revert "preconfigure git for being usable with datalad"

This reverts commit 9239437.

For some reason wasn't sufficient so we will just disable datalad for now

Author: yarikoptic

debian/rules

@@ -17,13 +17,6 @@ export PYBUILD_NAME = heudiconv
 %:
 	dh $@ --buildsystem=pybuild
 
-override_dh_auto_test::
-	mkdir -p build; \
-        export HOME=$(CURDIR)/build;  \
-        git config --global user.name "TESTING"; \
-        git config --global user.email "[email protected]"
-	HOME=$(CURDIR)/build dh_auto_test $@
-
 override_dh_auto_install:
 	help2man -n 'DICOM converter for organizing brain imaging data into structured directory layouts' \
 		-N --no-discard-stderr bin/heudiconv > build/heudiconv.1